Labour may be quick - at times too quick - to take umbrage at what John Key says or does.
But yesterday, the party's MPs could feel more than just miffed following some injudicious-sounding remarks the Prime Minister made after the protest from the public gallery.
Labour MPs drew the obvious conclusion when Key shouted in Labour's direction, "You should be ashamed of yourselves", and "That's down to you".
The Prime Minister was saying Labour was to blame for the man's behaviour. Well, Key's office says he wasn't saying that.
It might have helped had he stayed and explained himself. On the other hand, given Labour emotions, it may have been just as well that he didn't.